.hot-song{
    width: 100%;
    overflow: hidden;
}

.hot-song .ban {
    width: 100%;
    height: 38vw;
    background: url(../image/icon/hot_music_bg_2x.jpg) no-repeat;
    background-size: contain;
    padding: 25px 20px 0;
    position: relative;
}

.hot-song .ban::after{
    /* 需要设置为块级元素 */
    content: "";
    display: block;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.2);
    position: absolute;
    top: -5px;
    left: 0;
    /* z-index（图层） */
    z-index: 1;
}

.hot-song .ban .pic {
    z-index: 2;
    position: relative;
    width: 142px;
    height: 67px;
    background: url(../image/icon/index_icon_2x.png) no-repeat;
    background-size: 166px 97px;
    background-position: -24px -30px;  
}

.hot-song .ban .pic span{
    position: absolute;
    bottom: -25px;
    font-size: 12px;
    color: #fff;
}